Jonker JS1
| Jonker JS1 | |
|---|---|
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|
|
| Type: | Glider of FAI 18m class and open class |
| Design country: | |
| Manufacturer: | |
| First flight: |
December 12, 2006 |
| Production time: |
2007– |
| Number of pieces: |
100 (as of January 2016) |
Jonker JS1 Revelation and Jonker JS1-TJ Jet Sustainer are single-seat gliders of the FAI 18m class made of plastic reinforced with glass , carbon and aramid fibers ("Kevlar"). The successor, the Jonker JS1-C Revelation, has a wingspan that is three meters longer and therefore flies in the open class .
history
The South African aircraft manufacturer, Jonker Sailplanes, was founded in 2004 by the two brothers Attie and Uys Jonker. The maiden flight of the JS1 took place on December 12, 2006, the JS1-C took off for the first time on March 22, 2012. The designer of the JS1 is Attie Jonker, the surface profile was developed by Johan Bosman in collaboration with the TU Delft .
technology
The four-part wing is equipped with flaperons over the full span , has winglets and three-tier Schempp-Hirth brake flaps . The aircraft is designed for performance flight and can be optionally equipped with an engine. Some design features are:
- Blow turbulators in the wings to minimize drag.
- The wing profile was specially designed for this series and has a maximum relative thickness of only 12.7%.
- Patented cockpit suction "JS Louvred Air Extractor"
- A turbine drive as a "lull pusher" for the JS1-TJ. A version of the JS1 with a self-starter is under development.
use
In 2008, Attie Jonker won the 18-meter class at the South African National Championships with a JS1 Revelation. Since then, national and international competitions have been won annually ( as of March 2014 ) or finished in the top places.
Incidents
On April 29, 2012, a Jonker JS1-B crashed in the US after the pilot lost control of the rudder in the air. He was able to save himself with the parachute.
Technical specifications
| Parameter | JS1 Revelation (A / B) | JS1 C |
|---|---|---|
| crew | 1 | |
| span | 18 m | 21 m |
| Wing area | 11.1 m² | 12.25 m² |
| Wing extension | 29 | 36 |
| profile | JS-02-127 T12 in 6 variations | |
| Hull length | 7.165 m | |
| Empty weight with minimum equipment | 280 kg | |
| Water ballast | 200 kg | |
| Max. Takeoff mass | 600 kg | 720 kg |
| Max. Wing loading | 53.6 kg / m² | 58.7 kg / m² |
| min. Wing loading | 31.2 kg / m² | 33.8 kg / m² |
| Top speed | 290 km / h | 270 km / h |
| Maneuver speed | 203 km / h | |
| Minimum speed | 75 km / h | |
| Slightest sinking | 0.5 m / s | 0.48 m / s |
| Glide ratio | 53 | 60 |
| Gliding Index , DAeC Index List 2017 | 119 | 122 |
See also
Web links
- Europe representative Jonker Sailplanes
- JS1 Revelation and JS1 Jet Sustainer on the Jonker Sailplanes website
Individual evidence
- ↑ 100th JS1 push out. (No longer available online.) In: jonkersailplanes.co.za. January 2016, archived from the original on February 27, 2017 ; accessed on January 12, 2017 (English).
- ^ Soaring Café , accessed March 11, 2014
- ^ Jonker Sailplanes ( Memento of March 11, 2014 in the Internet Archive ), accessed on March 11, 2014
- ^ Air Extractor ( Memento from March 11, 2014 in the Internet Archive ), accessed on March 11, 2014
- ^ ASN , accessed March 11, 2014
- ^ Dimensions and Weight. (No longer available online.) In: jonkersailplanes.co.za. Archived from the original on December 31, 2016 ; accessed on December 31, 2016 (English).